1. Soo Park Alex Reynolds Kate Schmidt Connie Woo Christine Zackrison
The Water Cycle
Soo Park
Alex Reynolds
Kate Schmidt
Connie Woo
Christine Zackrison

3. Arguably the most important natural phenomenon on Earth, the water cycle, also known as the hydrologic cycle, describes the constant movement and endless recycling of water between the atmosphere, land surface, and under the ground. The hydrologic cycle supplies the force needed for most natural processes, thus supporting life itself.

5. The Water Molecule
H20 consists of one atom of oxygen bound to two atoms of hydrogen. The water molecule has a positive charge on the side of hydrogen atoms and a negative charge on the other side. Water molecules tend to attract each other because the positive ends attract to the negative ends.

6. Water is a “universal solvent: and wherever it goes throughout the water cycle, it takes up valuable chemicals, minerals and nutrients.

7. Condensation
The change from a liquid to a gas. In the water cycle, the change from water to water vapor.

8. Condensation & Convection
Warm air rises
Air cools and can no longer hold vapor
Process known as CONVECTION

9. Condensation & Cloud Formation
Cooling of water vapor forms CLOUDS
Other ways clouds are formed
Convergence
Lifting of air by fronts

10. Precipitation

11. Snow
Snow is a type of precipitation like rain but at cooler temperatures
Usually reaches the ground and stays
Eventually melts and becomes runoff in streams

12. Rain Type of precipitation during warmer weather
Occurs when clouds become too full
Falls to earth in the form of water and runs off to streams & rivers

13. Freshwater Storage
Water may be stored temporarily in the ground, oceans, lakes, rivers, and ion ice caps and glaciers.

14. The world’s two main reservoirs of fresh water are the great polar ice caps, and the ground.
If all of the ice in the ice caps and other glaciers melted, it would raise the sea level by about 260 ft.

15. In temperate climates, water is found in depression storage or surface water puddles, ditches, and anywhere else that runoff water can gather. This is a temporary form of storage

16. Freshwater Flow

17. A hydrologist is particularly interested in stream flow -- the 31% of precipitation which runs off into rivers, streams and lakes.

18. About 3% of this water will seep underground
About 31% will run off into rivers, streams and lakes
About 66% of the water returns to the atmosphere through evaporation and transpiration

19. Surface Runoff
When precipitation rate exceeds infiltration rate, or when soil is saturated, water begins to move down slope on ground surface.

20. Surface Runoff
surface runoff gradually flows into gullies, streams, lakes, or rivers. Water in streams and rivers flows to the ocean, seeps into the ground, or evaporates back into the atmosphere.

21. Water Storage in Oceans

22. The largest reservoir is the oceans
The largest reservoir is the oceans. There is about 50 times as much water in the oceans than in the next largest reservoir, polar ice and glaciers.

23. Water Storage in Ice and Snow
Water precipitates into cooler areas of land and freeze into ice and snow.

24. Snowmelt Runoff to Streams
Precipitation falls in the form of rain and snow
When the snow melts it runs into streams which eventually dump into the ocean

25. Infiltration

26. -Rain water soaks into ground through soil and underlying rock layer.
-Water cleaned as impurities filtered

27. -Some water remains underground as groundwater.
-Some water returns to surface at springs or low spots downhill.

28. Groundwater Storage

29. - water seeps downward underground into soil and rock crevices
-then stored underground in rock crevices and in the pores of geologic materials that make up the Earth's crust

30. -Water storage under the ground largely depends on the geologic features related to the types of soil and the types of rocks present at the storage locations.
-underground storage occurs in the soil, in aquifers, and in the crevices of rock formations

31. Evaporation Conversion of water from a liquid into a gas
Water transferred from surface to atmosphere through evaporation
                         

33. Evaporation & the Sun
The sun heats up water in the ocean, rivers, or lakes, turning it into vapor, which then goes into the air

34. Evaporation Cont. 80% of evaporation from ocean
20% of evaporation from inland water and vegetation
Winds transport evaporated water, influencing humidity around the world

35. Transpiration
The process of evaporation from plants. Basically, plants sweating.

37. Transpiration Cont. Environmental factors that affect transpiration:
Light
Temperature
Humidity
Wind
Soil water

38. Good For Plants!!
Transpiration is the “engine” of plant life, pulling water up from the roots. This allows for photosynthesis, brings minerals from the roots to the rest of the plant, and cools the leaves.

39. Water Storage in Atmosphere

40. -atmosphere holds only very small percentage of Earth’s water supply at any given time
-rapid recycling of water must occur between earth's surface and atmosphere
World Water Supply
Source
% of Supply
Oceans
97.08
Ice Sheets and Glaciers
1.99
Ground Water
0.62
Atmosphere
0.29
Lakes (Fresh)
0.01
Inland Seas / Salt Water Lakes
0.005
Soil Moisture
0.004
Rivers
0.001

41. - Water stored in the atmosphere can be moved relatively quickly from one part of the planet to another part of the planet

44. By: Soo, Christine, Connie, Kate, Alex
We like you Dr. E!